“You get a lot of convictions when you testify, I’d imagine,” Shean offered.

“Nearly one hundred percent,” Rhyme said, with only a veneer of modesty. “Of course, if the odds aren’t good up front I recommend not going to trial. Though I’m not above bluffing somebody into a confession. Now, I need to run an inductively coupled plasma test.”

Shean said, “Mass spectrometry. Well, we can do that.”

“I’m so pleased.”

“But—well, just curious—why that, if you’re analyzing ash?”

“For the metals, of course,” Amelia Sachs pointed out.

The CSU head tapped his forehead. “Trace metals in cigarette ash. Brilliant. I never thought of that.”

Rhyme said absently, “It’s the most definitive way to determine the brand and origin of cigarettes when all you have is ash. I vastly prefer a fleck of tobacco itself too, because then you can factor in desiccation and other absorbed trace substances. That can pinpoint location of storage and time.” He added a caveat, “Up to a point.”

Shean prepared the sample and ran the test and a short time later they had their answer.

Looking over the computer screen, Rhyme offered, “Zinc 351.18, iron 2785.74 and chromium 5.59. No arsenic. Yep, that’s Marlboro.”

“You know that?” Harutyun asked.

A shrug—one of the few gestures the criminalist was capable of—and one that he used with some frequency.

He announced, “I’ll say it’s likely that the same person was at both scenes. But remember, Person A could have been at the first site, smoking a Marlboro. Person B could have bummed one off him and set up the trap at the Mountain View Motel. Not likely but it could be. How long for the DNA?”

“Another few days.”

A grimace. “But it’s not any better in New York, of course. I don’t think you’ll find any, though. Your perp is smart. He probably lit it by blowing on the tip, not holding it in his lips. So, does this Edwin Sharp smoke?”

“He used to,” Dance said. “Still may sometimes but we don’t know.”

They couldn’t draw any conclusions from the boot print—really just the toe. Sachs studied the electrostatic print. “Agree that it’s probably a cowboy boot. Pretty common in New York a few years ago—line dancing was all the rage.” She added that Rhyme had compiled a footwear database but the electrostatic image was too fuzzy to give them a brand name.

“All right, the fishing line … nothing there, I’m afraid. ‘Generic’ is a word I dislike very much. Let’s look at the shell casings.”

Shean reiterated that he thought the gun at both the Blanton shooting and the Sheri Towne attack was probably the same.

“You can say ‘match,’” Rhyme said. “Won’t bite you, in this context. But where did the gun come from? Stolen from one of your officers, you were saying?”

“Possibly—Gabriel Fuentes. He’s been suspended.”

“I heard.”

“I wish we could tell. It might help incriminate Sharp. He was near Gabe’s car when the gun was stolen. But we don’t know for sure.”